AI agents call estimate_price to retrieve information from Kuaidi100 MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and calculates shipping cost estimates without creating financial obligations, modifying records, or executing external operations. It provides informational output similar to other Read-category logistics tools (query_trace, estimate_time). While related to pricing, it does not actually process payments or commit financial transactions—it merely estimates costs.
From the tool's definition Tool name 'estimate_price' with description indicating it provides price estimation ('预估快递公司运费' = estimate courier company shipping fees) based on courier, addresses, and weight. Returns calculated information without modifying data or triggering transactions.
Documented attack patterns abuse exactly the kind of access estimate_price gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Kuaidi100 MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for estimate_price:
{
"version": "1",
"default": "deny",
"tools": {
"estimate_price": {}
}
}estimate_price is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
通过快递公司、收寄件地址和重量，预估快递公司运费. It is categorised as a Read tool in the Kuaidi100 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Kuaidi100 MCP Server MCP server in PolicyLayer and add a rule for estimate_price: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Kuaidi100 MCP Server. Nothing to install.
estimate_price is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the estimate_price rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for estimate_price. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
estimate_price is provided by the Kuaidi100 MCP Server MCP server (kuaidi100-api/kuaidi100-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Kuaidi100 MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
5 Kuaidi100 MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.